Abstract: A pressure reducer assembly having a connection fitting for connecting the pressure reducer assembly to a pipe or other water containing element, the connection fitting having a housing with an opening, an inlet exposed to an inlet pressure, an outlet exposed to an outlet pressure, and a separating wall inside the housing for separating the inlet from the outlet and having an opening in the separating wall. A pressure reducer insert extends from the housing opening. The pressure reducer insert is designed in such a way that the pressure effective cross section of the pressure reducer insert which is exposed to the inlet pressure is essentially the same as the pressure effective cross section of the pressure reducer insert in the opening in the separating wall exposed to the inlet pressure. This allows the pressure reducer insert to be made of plastic material.

Abstract: A system disconnector for physically disconnecting an upstream liquid system from a downstream liquid system by means of an outlet valve (35;135) depending on the pressure difference between the upstream and the downstream liquid system comprises an upstream backflow preventer (48; 148), a downstream backflow preventer (88), and an outlet valve body in the form of a piston (26; 126) arranged between the backflow preventers (48, 88). The pressure difference at the outlet valve body (26; 126) between the inlet pressure and the medium pressure between the backflow preventers counteracts a biasing spring (82; 182) acting in the opening direction of the outlet valve body. An actuating member (64; 164), which is exposed to the inlet pressure on one side and to the medium pressure on the other side is adapted to move between two stops (54, 46; 171, 146) against the power of a spring (86; 182) to compensate for small changes in inlet pressure and prevent dripping of the valve.

Abstract: A system disconnector for disconnecting an upstream liquid system providing an inlet pressure from a downstream liquid system by a release valve (34) in response to a pressure drop between the systems, includes an upstream backflow preventer (40), a downstream backflow preventer (64) and a release valve body piston (18) arranged between the backflow preventers (40, 64). A pressure difference between the inlet pressure and a middle pressure between the backflow preventers (40,64) counteracts a spring (60) biasing the release valve body in the opening direction, the release valve body (18) having an effective pressurized surface (d) smaller than the surface effective for the inlet pressure. A hollow space (74) defined by the release valve body is connected to the middle pressure (66). A shiftable seat (76) provided in hollow space (74), is movable with respect to the release valve body to a fixed stop (84) upstream of the valve seat (32).

Abstract: A system disconnector (10) for physically disconnecting an upstream liquid system from a downstream liquid system by means of an outlet valve (48) provided in a housing (16), the disconnecting being effected depending on the pressure drop between the upstream and the downstream liquid system, and wherein the housing (16) is provided with a bore (28) and an opening (26) in alignment with said bore (28), said opening adapted to be closed, includes a pressure reducer (66, 36) in the form of a cartridge provided in said bore (28), which is adapted to be removed in one piece from the housing (16). The system disconnector (10) is provided with an upstream backflow preventer (40), a downstream backflow preventer (42), and an outlet valve body in the form of a piston (44) biased by a spring, said outlet valve body disposed between said backflow preventers, wherein the pressure reducer cartridge (34, 36), the backflow preventers (40, 42), and the outlet valve body (44) are disposed in alignment inside the bore (28).

Abstract: A pressure reducer assembly (10) with an inlet (26) and an outlet (78) adapted to be connected through a valve, having a fixed valve disc (42) and a valve seat body (62) cooperating with the valve disc (42), the valve seat body adapted to be set by a lifting member, which is exposed to the outlet pressure in a closing direction against the bias of a helical spring (50), wherein the inlet and the space (68) upstream of the valve seat (74) are in fluid communication through an axial bore hole (36) in a valve spindle (34) which is connected to the valve disc (42), the valve seat body (62) is pot shaped and moveably guided on the valve spindle (34), the helical spring (50) surrounds the valve spindle (34) coaxially to the bore hole (36) and acts between a spring abutment (38) provided at the valve spindle (34) and the pot shaped valve seat body (62).

Abstract: An assembly (10) for feeding water from a water supply into heating systems having a drinking water heater and a heating circulation installation includes a fresh water inlet (14) to be connected to the water supply, a first outlet (16) with a first shut-off valve (32) to be connected to the water heater, and a second outlet (26) with a second shut-off valve (98) to be connected to the heating circulation installation. A differential pressure controlled outlet valve (60) between two backflow preventers (62, 64) forms a system disconnector between the fresh water inlet and the second outlet for physically disconnecting the water supply from the heating circulation installation. This arrangement uses only one fresh water connection to supply both the drinking water heater and the heating circulation installation. Accordingly, the assembly is less voluminous and a separate assembly for filling and re-filling the heating circulation installation is not necessary.

Abstract: A system disconnector for physically disconnecting an upstream liquid system from a downstream liquid system by means of a release valve (34) in response to a pressure drop between the upstream and downstream liquid system, with an upstream backflow preventer (40), a downstream backflow preventer (64) and a release valve body (18) in the form of a piston which is, regarding the flow, arranged between the backflow preventers (40, 64), an inlet pressure of the upstream liquid system upstream from the upstream backflow preventer (40), a middle pressure in a middle pressure space (66) between the release valve body (18) and the downstream backflow preventer (64) and an outlet pressure of the downstream liquid system downstream of the downstream backflow preventer (64), wherein a pressure difference between the inlet pressure and the middle pressure counteracts a spring (60) biasing the release valve body in the opening direction and wherein the release valve body (18) has an effective pressurized surface (d) whic

Abstract: A system disconnector for physically disconnecting an upstream liquid system from a downstream liquid system by means of an outlet valve (35;135) depending on the pressure difference between the upstream and the downstream liquid system comprises an upstream backflow preventer (48; 148), a downstream backflow preventer (88), and an outlet valve body in the form of a piston (26; 126) arranged between the backflow preventers (48, 88). The pressure difference at the outlet valve body (26; 126) between the inlet pressure and the medium pressure between the backflow preventers counteracts a biasing spring (82; 182) acting in the opening direction of the outlet valve body. The system disconnector is characterised by an actuating member (64; 164) limiting the medium pressure space (90; 190), which is exposed to the inlet pressure on one side and to the medium pressure on the other side and which is adapted to move between two stops (54, 46; 171, 146) against the power of a spring (86; 182).

Abstract: A fitting assembly for liquids adapted to be installed in a pipeline includes an inlet and first shut-off governing said inlet, an outlet and second shut-off governing said outlet, and components which require occasional or regular servicing arranged in a flow path between said first and second shut-offs. The said fitting assembly comprises a first fitting part adapted to be fixedly installed in said pipeline by means of said first and second shut-offs, said first fitting part having first and second connections between said first and second shut-offs, said fitting assembly comprises a second fitting part, said second fitting part containing the components which require occasional or regular servicing, and a means for removably attaching said second fitting part to said connecting means of said first fitting part.

Abstract: The invention relates to a valve assembly of a pipe disconnector for separating a service water system which is arranged to be filled or re-filled from a drinking water system, comprising upstream and downstream backflow preventers which both close in the direction from the service water system to the drinking water system, and a relief valve, which is exposed to the pressure of the drinking water system in closing direction and which is adapted to connect the space between the backflow preventers to a drain, when this pressure ceases. A pipe disconnector is to be provided, which is easy to clean and to service. Furthermore, a valve assembly is to be provided which can be used equally for pipe disconnectors of the type CA and for pipe disconnectors of the type BA.

Abstract: A pressure reducer has a housing with inlet and outlet sockets, a partition between said inlet and outlet sockets, and an accommodation socket. The partition defines an aperture aligned with the accommodation socket. A pressure reducer insert is inserted into the accommodation socket and the aperture. The pressure reducer insert has a tapering, funnel-like insert housing, a valve seat, and webs for connecting the insert housing with a valve seat sealingly mounted in the aperture. A regulating diaphragm closes the open end to define a controlled pressure chamber which communicates with an outlet chamber. A cap encloses a biased helical spring and a bias setting threaded spindle rotatably mounted in the cap. A setting knob is axially movable between a first position non-rotatably coupled with the cap, and a second position rotatable relative to the cap where rotation of the knob rotates the bias setting spindle and adjusts the pressure setting.

Abstract: An apparatus for water treatment by means of an electrical field is provided with an anode and a cathode in at least one treatment chamber through which the water to be treated passes. The apparatus is characterized in that the at least one treatment chamber forms a prismatic space with an elongated cross section, the anode and the cathode are formed by pairs of parallel, stick-shaped electrodes which extend spaced apart into said space and a voltage is applicable between the electrodes. One end of the at least one treatment chamber is connected to a water inlet and the other end of the at least one treatment chamber is connected to a water outlet, whereby a waterflow from one electrode to the other is generatable which is substantially transverse to the longitudinal axes of the electrodes.

Abstract: A pressure reducer has a housing with inlet and outlet sockets, a partition between said inlet and outlet sockets, and an accommodation socket. The partition defines an aperture aligned with the accommodation socket. A pressure reducer insert is inserted into the accommodation socket and the aperture. The pressure reducer insert has a tapering, funnel-like insert housing, a valve seat, and webs for connecting the insert housing with a valve seat sealingly mounted in the aperture. A regulating diaphragm closes the open end to define a controlled pressure chamber which communicates with an outlet chamber. A cap encloses a biased helical spring and a bias setting threaded spindle rotatably mounted in the cap. A setting knob is axially movable between a first position non-rotatably coupled with the cap, and a second position rotatable relative to the cap where rotation of the knob rotates the bias setting spindle and adjusts the pressure setting.

Abstract: In a pressure reducer with an inlet pressure chamber with a cylindrical dirt trap dividing the inlet pressure chamber into an inlet-side sub-chamber and a control valve-side sub-chamber, there are backflow means (74) for generating a backflow through the dirt trap from the control valve-side sub-chamber provided within the inlet-side sub-chamber adjacent to the dirt trap. Such backflow means are provided with an annular body with an annular chamber, wherein the annular body is on the outside sealingly guided in a housing of the pressure reducer by two spaced apart sealing rings which surround the dirt trap. The annular body is provided with axially projecting sucking ribs adjacent to the dirt trap and open towards the dirt trap which are connected to the annular chamnber of the annular body. The annular body is rotatable about the dirt trap. The annular chamber can be connected to an outlet by a stop valve.

Abstract: The invention relates to a valve assembly of a pipe disconnector for separating a service water system which is arranged to be filled or re-filled from a drinking water system, comprising upstream and downstream backflow preventers which both close in the direction from the service water system to the drinking water system, and a relief valve, which is exposed to the pressure of the drinking water system in closing direction and which is adapted to connect the space between the backflow preventers to a drain, when this pressure ceases. A pipe disconnector is to be provided, which is easy to clean and to service. Furthermore, a valve assembly is to be provided which can be used equally for pipe disconnectors of the type CA and for pipe disconnectors of the type BA.

Abstract: The invention relates to an apparatus for treating water by means of an electric field. An Anode and a cathode are arranged in a treatment chamber. The cathode has a plurality of parallel pins. Seed crystals are deposited on these pins. There are means for separating these seed crystals from the pins. The apparatus is to be of simple design and is to have high efficiency with regard to the formation of seed crystals. The cathode is to be kept free from lime depositions. To this end, the seed crystals are separated or stripped from the pins by means of a perforated disc. The pins extend through the holes of this perforated disc. The perforated disc is guided over the pins. The perforated disc can be moved by water pressure or by an electric motor. The electric motor has as second function the actuation of a safety valve controlled by a monitoring device.

Abstract: An apparatus for water treatment by means of an electrical field is provided with an anode and a cathode in at least one treatment chamber through which the water to be treated passes. The apparatus is characterized in that the at least one treatment chamber forms a prismatic space with an elongated cross section, the anode and the cathode are formed by pairs of parallel, stick-shaped electrodes which extend spaced apart into said space and a voltage is applicable between the electrodes. One end of the at least one treatment chamber is connected to a water inlet and the other end of the at least one treatment chamber is connected to a water outlet, whereby a waterflow from one electrode to the other is generatable which is substantially transverse to the longitudinal axes of the electrodes.

Abstract: The invention relates to an apparatus for treating water by means of an electric field. An anode and a cathode are arranged in a treatment chamber. Seed crystals are deposited on the anode and are stripped therefrom to be carried along with the water, which cause crystallization thereon of carbonates contained in the water. Thereby formation of boiler scale, when the water is heated, is reduced. The water from the treatment chamber is exposed to another electric field in an aftertreatment chamber for a dwell time longer than the dwell time in the treatment chamber. Thereby, the growth of the seed crystals is enhanced. The efficiency of a treatment chamber with aftertreatment is higher than the efficiency of the treatment chamber alone.

Abstract: The invention relates to a connection fitting for connecting a pressure expansion vessel to a conduit system, in which a water flow flows, a diaphragm dividing said vessel into a cavity filled with water and a pressurized gas chamber filled with pressurized gas. The fitting comprises a suction device, in which a suction is generated by the water flow and a water exchange flow is generated by means of this suction along a flow path extending parallel to the water flow and through the cavity. A plug valve is arranged to shut off the parallel flow path. The valve plug is directly arranged between a first formed body forming the suction device and located adjacent to the water flow and a second formed body likewise located in the connecting socket on the side of the pressure expansion vessel. The formed bodies and the valve plug have coaxial passages, which are aligned with each other and form forward-flow path and return-flow path of a flow path parallel to the water flow.

Abstract: The invention relates to a filling fitting for filling a closed hot-water heating system, the filling fitting comprising a tube separator including an upstream backflow preventer, a downstream backflow preventer and a drain valve controlled by the inlet pressure and arranged, with regard to the flow, between said two backflow preventers, and a pressure reducer. This construction allows the downstream pressure reducer to be used in two manners, on one hand in connection with the tube separator and, on the other hand, in order to allow the pressure reducer to be removed. By dividing the filling fitting into two fitting portions, of which the second one only comprises the pressure reducer and the downstream backflow preventer, the second fitting portion can also be used alone without tube separator, when the safety requirements are less strict.